31.121.0.0/16 - BT UK British Telecommunications Limited (AS2856)
CIDR
31.121.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇬🇧 United Kingdom
City
London
RIR
RIPE
Status
assigned
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 31.121.0.0/16 | AS2856 BT-UK-AS British Telecommunications Limited | Valid | RIPE | 2026-10-11 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 31.121.0.0/16 | AS2856 | /16 | ripe |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS2856 | RIPE | BTNET-INFRA-MNT | 2019-05-22 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 31.121.4.0/26 | 🇬🇧GB | assigned | |
| 31.121.4.224/27 | 🇬🇧GB | assigned | |
| 31.121.7.224/27 | 🇬🇧GB | assigned | |
| 31.121.8.192/26 | 🇬🇧GB | assigned | |
| 31.121.9.128/25 | 🇬🇧GB | assigned | |
| 31.121.11.32/27 | 🇬🇧GB | assigned | |
| 31.121.11.64/26 | 🇬🇧GB | assigned | |
| 31.121.11.160/27 | 🇬🇧GB | assigned | |
| 31.121.12.224/27 | 🇬🇧GB | assigned | |
| 31.121.13.0/25 | 🇬🇧GB | assigned | |
| 31.121.16.32/27 | 🇬🇧GB | assigned | |
| 31.121.16.192/27 | 🇬🇧GB | assigned | |
| 31.121.21.160/27 | 🇬🇧GB | assigned | |
| 31.121.22.0/27 | 🇬🇧GB | assigned | |
| 31.121.22.64/27 | 🇬🇧GB | assigned | |
| 31.121.22.224/27 | 🇬🇧GB | assigned | |
| 31.121.23.224/27 | 🇬🇧GB | assigned | |
| 31.121.28.32/27 | 🇬🇧GB | assigned | |
| 31.121.29.160/27 | 🇬🇧GB | assigned | |
| 31.121.35.32/27 | 🇬🇧GB | assigned | |
| 31.121.37.0/24 | 🇬🇧GB | assigned | |
| 31.121.38.128/27 | 🇬🇧GB | assigned | |
| 31.121.42.192/26 | 🇬🇧GB | assigned | |
| 31.121.43.224/27 | 🇬🇧GB | assigned | |
| 31.121.47.0/27 | 🇬🇧GB | assigned | |
| 31.121.47.128/26 | 🇬🇧GB | assigned | |
| 31.121.47.192/26 | 🇬🇧GB | assigned | |
| 31.121.50.0/24 | 🇬🇧GB | assigned | |
| 31.121.52.192/27 | 🇬🇧GB | assigned | |
| 31.121.62.192/27 | 🇬🇧GB | assigned | |
| 31.121.66.128/26 | 🇬🇧GB | assigned | |
| 31.121.66.192/26 | 🇬🇧GB | assigned | |
| 31.121.67.64/26 | 🇬🇧GB | assigned | |
| 31.121.68.0/26 | 🇬🇧GB | assigned | |
| 31.121.69.96/27 | 🇬🇧GB | assigned | |
| 31.121.72.0/26 | 🇬🇧GB | assigned | |
| 31.121.72.128/25 | 🇬🇧GB | assigned | |
| 31.121.73.64/27 | 🇬🇧GB | assigned | |
| 31.121.74.160/27 | 🇬🇧GB | assigned | |
| 31.121.75.0/24 | 🇬🇧GB | assigned | |
| 31.121.77.128/25 | 🇬🇧GB | assigned | |
| 31.121.82.192/26 | 🇬🇧GB | assigned | |
| 31.121.83.0/25 | 🇬🇧GB | assigned | |
| 31.121.85.160/27 | 🇬🇧GB | assigned | |
| 31.121.92.224/27 | 🇬🇧GB | assigned | |
| 31.121.95.128/27 | 🇬🇧GB | assigned | |
| 31.121.98.96/27 | 🇬🇧GB | assigned | |
| 31.121.99.0/27 | 🇬🇧GB | assigned | |
| 31.121.102.160/27 | 🇬🇧GB | assigned | |
| 31.121.105.64/26 | 🇬🇧GB | assigned | |
| 31.121.105.160/27 | 🇬🇧GB | assigned | |
| 31.121.110.128/27 | 🇬🇧GB | assigned | |
| 31.121.119.64/26 | 🇬🇧GB | assigned | |
| 31.121.119.224/27 | 🇬🇧GB | assigned | |
| 31.121.122.224/27 | 🇬🇧GB | assigned | |
| 31.121.125.128/27 | 🇬🇧GB | assigned | |
| 31.121.132.128/27 | 🇬🇧GB | assigned | |
| 31.121.132.160/27 | 🇬🇧GB | assigned | |
| 31.121.133.128/25 | 🇬🇧GB | assigned | |
| 31.121.135.128/27 | 🇬🇧GB | assigned | |
| 31.121.136.0/26 | 🇬🇧GB | assigned | |
| 31.121.136.160/27 | 🇬🇧GB | assigned | |
| 31.121.141.160/27 | 🇬🇧GB | assigned | |
| 31.121.141.224/27 | 🇬🇧GB | assigned | |
| 31.121.142.64/26 | 🇬🇧GB | assigned | |
| 31.121.143.64/27 | 🇬🇧GB | assigned | |
| 31.121.143.160/27 | 🇬🇧GB | assigned | |
| 31.121.149.96/27 | 🇬🇧GB | assigned | |
| 31.121.152.128/27 | 🇬🇧GB | assigned | |
| 31.121.155.64/27 | 🇬🇧GB | assigned | |
| 31.121.155.208/28 | 🇬🇧GB | assigned | |
| 31.121.157.96/27 | 🇬🇧GB | assigned | |
| 31.121.159.32/27 | 🇬🇧GB | assigned | |
| 31.121.160.160/27 | 🇬🇧GB | assigned | |
| 31.121.164.192/27 | 🇬🇧GB | assigned | |
| 31.121.165.128/27 | 🇬🇧GB | assigned | |
| 31.121.165.192/27 | 🇬🇧GB | assigned | |
| 31.121.169.160/27 | 🇬🇧GB | assigned | |
| 31.121.170.0/26 | 🇬🇧GB | assigned | |
| 31.121.171.192/27 | 🇬🇧GB | assigned | |
| 31.121.172.128/26 | 🇬🇧GB | assigned | |
| 31.121.174.0/27 | 🇬🇧GB | assigned | |
| 31.121.175.0/25 | 🇬🇧GB | assigned | |
| 31.121.175.192/26 | 🇬🇧GB | assigned | |
| 31.121.176.128/27 | 🇬🇧GB | assigned | |
| 31.121.178.96/27 | 🇬🇧GB | assigned | |
| 31.121.178.224/27 | 🇬🇧GB | assigned | |
| 31.121.179.64/27 | 🇬🇧GB | assigned | |
| 31.121.182.64/27 | 🇬🇧GB | assigned | |
| 31.121.188.192/27 | 🇬🇧GB | assigned | |
| 31.121.191.0/26 | 🇬🇧GB | assigned | |
| 31.121.195.0/27 | 🇬🇧GB | assigned | |
| 31.121.198.0/23 | 🇬🇧GB | assigned | |
| 31.121.208.0/24 | 🇬🇧GB | assigned | |
| 31.121.212.160/27 | 🇬🇧GB | assigned | |
| 31.121.217.144/28 | 🇬🇧GB | assigned | |
| 31.121.217.192/28 | 🇬🇧GB | assigned | |
| 31.121.217.208/28 | 🇬🇧GB | assigned | |
| 31.121.218.0/28 | 🇬🇧GB | assigned | |
| 31.121.218.128/28 | 🇬🇧GB | assigned |
Related Prefixes
More prefixes of AS2856
All prefixes of AS2856 →Geolocation
Abuse Contact
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfer marketTransfers published by all five RIRs
API
Open https://api.ipctl.io/v1/prefix/31.121.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/31.121.0.0/16" | jq
External Links